var __extends = (this && this.__extends) || (function () {
    var extendStatics = Object.setPrototypeOf ||
        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
        function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "../release/go"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    /*
    *  Copyright (C) 1998-2019 by Northwoods Software Corporation. All Rights Reserved.
    */
    var go = require("../release/go");
    /**
    * @constructor
    * @extends CommandHandler
    * @class
    * This CommandHandler class allows the user to position selected Parts in a diagram
    * relative to the first part selected, in addition to overriding the doKeyDown method
    * of the CommandHandler for handling the arrow keys in additional manners.
    * <p>
    * Typical usage:
    * <pre>
    *   $(go.Diagram, "myDiagramDiv",
    *     {
    *       commandHandler: $(DrawCommandHandler),
    *       . . .
    *     }
    *   )
    * </pre>
    * or:
    * <pre>
    *    myDiagram.commandHandler = new DrawCommandHandler();
    * </pre>*/
    var DrawCommandHandler = /** @class */ (function (_super) {
        __extends(DrawCommandHandler, _super);
        function DrawCommandHandler() {
            var _this = _super !== null && _super.apply(this, arguments) || this;
            _this._arrowKeyBehavior = "move";
            _this._pasteOffset = new go.Point(10, 10);
            _this._lastPasteOffset = new go.Point(0, 0);
            return _this;
        }
        /**
        * This controls whether or not the user can invoke the {@link #alignLeft}, {@link #alignRight},
        * {@link #alignTop}, {@link #alignBottom}, {@link #alignCenterX}, {@link #alignCenterY} commands.
        * @this {DrawCommandHandler}
        * @return {boolean}
        * This returns true:
        * if the diagram is not {@link Diagram#isReadOnly},
        * if the model is not {@link Model#isReadOnly}, and
        * if there are at least two selected {@link Part}s.
        */
        DrawCommandHandler.prototype.canAlignSelection = function () {
            var diagram = this.diagram;
            if (diagram === null || diagram.isReadOnly || diagram.isModelReadOnly)
                return false;
            if (diagram.selection.count < 2)
                return false;
            return true;
        };
        ;
        /**
        * Aligns selected parts along the left-most edge of the left-most part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignLeft = function () {
            var diagram = this.diagram;
            diagram.startTransaction("aligning left");
            var minPosition = Infinity;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                minPosition = Math.min(current.position.x, minPosition);
            });
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(minPosition, current.position.y));
            });
            diagram.commitTransaction("aligning left");
        };
        ;
        /**
        * Aligns selected parts at the right-most edge of the right-most part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignRight = function () {
            var diagram = this.diagram;
            diagram.startTransaction("aligning right");
            var maxPosition = -Infinity;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                var rightSideLoc = current.actualBounds.x + current.actualBounds.width;
                maxPosition = Math.max(rightSideLoc, maxPosition);
            });
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(maxPosition - current.actualBounds.width, current.position.y));
            });
            diagram.commitTransaction("aligning right");
        };
        ;
        /**
        * Aligns selected parts at the top-most edge of the top-most part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignTop = function () {
            var diagram = this.diagram;
            diagram.startTransaction("alignTop");
            var minPosition = Infinity;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                minPosition = Math.min(current.position.y, minPosition);
            });
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(current.position.x, minPosition));
            });
            diagram.commitTransaction("alignTop");
        };
        ;
        /**
        * Aligns selected parts at the bottom-most edge of the bottom-most part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignBottom = function () {
            var diagram = this.diagram;
            diagram.startTransaction("aligning bottom");
            var maxPosition = -Infinity;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                var bottomSideLoc = current.actualBounds.y + current.actualBounds.height;
                maxPosition = Math.max(bottomSideLoc, maxPosition);
            });
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(current.actualBounds.x, maxPosition - current.actualBounds.height));
            });
            diagram.commitTransaction("aligning bottom");
        };
        ;
        /**
        * Aligns selected parts at the x-value of the center point of the first selected part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignCenterX = function () {
            var diagram = this.diagram;
            var firstSelection = diagram.selection.first();
            if (!firstSelection)
                return;
            diagram.startTransaction("aligning Center X");
            var centerX = firstSelection.actualBounds.x + firstSelection.actualBounds.width / 2;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(centerX - current.actualBounds.width / 2, current.actualBounds.y));
            });
            diagram.commitTransaction("aligning Center X");
        };
        ;
        /**
        * Aligns selected parts at the y-value of the center point of the first selected part.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype.alignCenterY = function () {
            var diagram = this.diagram;
            var firstSelection = diagram.selection.first();
            if (!firstSelection)
                return;
            diagram.startTransaction("aligning Center Y");
            var centerY = firstSelection.actualBounds.y + firstSelection.actualBounds.height / 2;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                current.move(new go.Point(current.actualBounds.x, centerY - current.actualBounds.height / 2));
            });
            diagram.commitTransaction("aligning Center Y");
        };
        ;
        /**
        * Aligns selected parts top-to-bottom in order of the order selected.
        * Distance between parts can be specified. Default distance is 0.
        * @this {DrawCommandHandler}
        * @param {number} distance
        */
        DrawCommandHandler.prototype.alignColumn = function (distance) {
            var diagram = this.diagram;
            diagram.startTransaction("align Column");
            if (distance === undefined)
                distance = 0; // for aligning edge to edge
            distance = parseFloat(distance.toString());
            var selectedParts = new Array();
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                selectedParts.push(current);
            });
            for (var i = 0; i < selectedParts.length - 1; i++) {
                var current = selectedParts[i];
                // adds distance specified between parts
                var curBottomSideLoc = current.actualBounds.y + current.actualBounds.height + distance;
                var next = selectedParts[i + 1];
                next.move(new go.Point(current.actualBounds.x, curBottomSideLoc));
            }
            diagram.commitTransaction("align Column");
        };
        ;
        /**
        * Aligns selected parts left-to-right in order of the order selected.
        * Distance between parts can be specified. Default distance is 0.
        * @this {DrawCommandHandler}
        * @param {number} distance
        */
        DrawCommandHandler.prototype.alignRow = function (distance) {
            if (distance === undefined)
                distance = 0; // for aligning edge to edge
            distance = parseFloat(distance.toString());
            var diagram = this.diagram;
            diagram.startTransaction("align Row");
            var selectedParts = new Array();
            diagram.selection.each(function (current) {
                if (current instanceof go.Link)
                    return; // skips over go.Link
                selectedParts.push(current);
            });
            for (var i = 0; i < selectedParts.length - 1; i++) {
                var current = selectedParts[i];
                // adds distance specified between parts
                var curRightSideLoc = current.actualBounds.x + current.actualBounds.width + distance;
                var next = selectedParts[i + 1];
                next.move(new go.Point(curRightSideLoc, current.actualBounds.y));
            }
            diagram.commitTransaction("align Row");
        };
        ;
        /**
        * This controls whether or not the user can invoke the {@link #rotate} command.
        * @this {DrawCommandHandler}
        * @param {number=} angle the positive (clockwise) or negative (counter-clockwise) change in the rotation angle of each Part, in degrees.
        * @return {boolean}
        * This returns true:
        * if the diagram is not {@link Diagram#isReadOnly},
        * if the model is not {@link Model#isReadOnly}, and
        * if there is at least one selected {@link Part}.
        */
        DrawCommandHandler.prototype.canRotate = function (number) {
            var diagram = this.diagram;
            if (diagram === null || diagram.isReadOnly || diagram.isModelReadOnly)
                return false;
            if (diagram.selection.count < 1)
                return false;
            return true;
        };
        ;
        /**
        * Change the angle of the parts connected with the given part. This is in the command handler
        * so it can be easily accessed for the purpose of creating commands that change the rotation of a part.
        * @this {DrawCommandHandler}
        * @param {number=} angle the positive (clockwise) or negative (counter-clockwise) change in the rotation angle of each Part, in degrees.
        */
        DrawCommandHandler.prototype.rotate = function (angle) {
            if (angle === undefined)
                angle = 90;
            var diagram = this.diagram;
            diagram.startTransaction("rotate " + angle.toString());
            var diagram = this.diagram;
            diagram.selection.each(function (current) {
                if (current instanceof go.Link || current instanceof go.Group)
                    return; // skips over Links and Groups
                current.angle += angle;
            });
            diagram.commitTransaction("rotate " + angle.toString());
        };
        ;
        /**
        * This implements custom behaviors for arrow key keyboard events.
        * Set {@link #arrowKeyBehavior} to "select", "move" (the default), "scroll" (the standard behavior), or "none"
        * to affect the behavior when the user types an arrow key.
        * @this {DrawCommandHandler}*/
        DrawCommandHandler.prototype.doKeyDown = function () {
            var diagram = this.diagram;
            if (diagram === null)
                return;
            var e = diagram.lastInput;
            // determines the function of the arrow keys
            if (e.key === "Up" || e.key === "Down" || e.key === "Left" || e.key === "Right") {
                var behavior = this.arrowKeyBehavior;
                if (behavior === "none") {
                    // no-op
                    return;
                }
                else if (behavior === "select") {
                    this._arrowKeySelect();
                    return;
                }
                else if (behavior === "move") {
                    this._arrowKeyMove();
                    return;
                }
                // otherwise drop through to get the default scrolling behavior
            }
            // otherwise still does all standard commands
            _super.prototype.doKeyDown.call(this);
        };
        ;
        /**
        * Collects in an Array all of the non-Link Parts currently in the Diagram.
        * @this {DrawCommandHandler}
        * @return {Array}
        */
        DrawCommandHandler.prototype._getAllParts = function () {
            var allParts = new Array();
            this.diagram.nodes.each(function (node) { allParts.push(node); });
            this.diagram.parts.each(function (part) { allParts.push(part); });
            // note that this ignores Links
            return allParts;
        };
        ;
        /**
        * To be called when arrow keys should move the Diagram.selection.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype._arrowKeyMove = function () {
            var diagram = this.diagram;
            var e = diagram.lastInput;
            // moves all selected parts in the specified direction
            var vdistance = 0;
            var hdistance = 0;
            // if control is being held down, move pixel by pixel. Else, moves by grid cell size    
            if (e.control || e.meta) {
                vdistance = 1;
                hdistance = 1;
            }
            else if (diagram.grid !== null) {
                var cellsize = diagram.grid.gridCellSize;
                hdistance = cellsize.width;
                vdistance = cellsize.height;
            }
            diagram.startTransaction("arrowKeyMove");
            diagram.selection.each(function (part) {
                if (e.key === "Up") {
                    part.move(new go.Point(part.actualBounds.x, part.actualBounds.y - vdistance));
                }
                else if (e.key === "Down") {
                    part.move(new go.Point(part.actualBounds.x, part.actualBounds.y + vdistance));
                }
                else if (e.key === "Left") {
                    part.move(new go.Point(part.actualBounds.x - hdistance, part.actualBounds.y));
                }
                else if (e.key === "Right") {
                    part.move(new go.Point(part.actualBounds.x + hdistance, part.actualBounds.y));
                }
            });
            diagram.commitTransaction("arrowKeyMove");
        };
        ;
        /**
        * To be called when arrow keys should change selection.
        * @this {DrawCommandHandler}
        */
        DrawCommandHandler.prototype._arrowKeySelect = function () {
            var diagram = this.diagram;
            var e = diagram.lastInput;
            // with a part selected, arrow keys change the selection
            // arrow keys + shift selects the additional part in the specified direction
            // arrow keys + control toggles the selection of the additional part
            var nextPart = null;
            if (e.key === "Up") {
                nextPart = this._findNearestPartTowards(270);
            }
            else if (e.key === "Down") {
                nextPart = this._findNearestPartTowards(90);
            }
            else if (e.key === "Left") {
                nextPart = this._findNearestPartTowards(180);
            }
            else if (e.key === "Right") {
                nextPart = this._findNearestPartTowards(0);
            }
            if (nextPart !== null) {
                if (e.shift) {
                    nextPart.isSelected = true;
                }
                else if (e.control || e.meta) {
                    nextPart.isSelected = !nextPart.isSelected;
                }
                else {
                    diagram.select(nextPart);
                }
            }
        };
        ;
        /**
        * Finds the nearest Part in the specified direction, based on their center points.
        * if it doesn't find anything, it just returns the current Part.
        * @this {DrawCommandHandler}
        * @param {number} dir the direction, in degrees
        * @return {Part} the closest Part found in the given direction
        */
        DrawCommandHandler.prototype._findNearestPartTowards = function (dir) {
            var originalPart = this.diagram.selection.first();
            if (originalPart === null)
                return null;
            var originalPoint = originalPart.actualBounds.center;
            var allParts = this._getAllParts();
            var closestDistance = Infinity;
            var closest = originalPart; // if no parts meet the criteria, the same part remains selected
            for (var i = 0; i < allParts.length; i++) {
                var nextPart = allParts[i];
                if (nextPart === originalPart)
                    continue; // skips over currently selected part
                var nextPoint = nextPart.actualBounds.center;
                var angle = originalPoint.directionPoint(nextPoint);
                var anglediff = this._angleCloseness(angle, dir);
                if (anglediff <= 45) { // if this part's center is within the desired direction's sector,
                    var distance = originalPoint.distanceSquaredPoint(nextPoint);
                    distance *= 1 + Math.sin(anglediff * Math.PI / 180); // the more different from the intended angle, the further it is
                    if (distance < closestDistance) { // and if it's closer than any other part,
                        closestDistance = distance; // remember it as a better choice
                        closest = nextPart;
                    }
                }
            }
            return closest;
        };
        ;
        /**
        * @this {DrawCommandHandler}
        * @param {number} a
        * @param {number} dir
        * @return {number}
        */
        DrawCommandHandler.prototype._angleCloseness = function (a, dir) {
            return Math.min(Math.abs(dir - a), Math.min(Math.abs(dir + 360 - a), Math.abs(dir - 360 - a)));
        };
        ;
        /**
        * Reset the last offset for pasting.
        * @override
        * @this {DrawCommandHandler}
        * @param {Iterable.<Part>} coll a collection of {@link Part}s.
        */
        DrawCommandHandler.prototype.copyToClipboard = function (coll) {
            _super.prototype.copyToClipboard.call(this, coll);
            this._lastPasteOffset.set(this.pasteOffset);
        };
        ;
        /**
        * Paste from the clipboard with an offset incremented on each paste, and reset when copied.
        * @override
        * @this {DrawCommandHandler}
        * @return {Set.<Part>} a collection of newly pasted {@link Part}s
        */
        DrawCommandHandler.prototype.pasteFromClipboard = function () {
            var coll = _super.prototype.pasteFromClipboard.call(this);
            this.diagram.moveParts(coll, this._lastPasteOffset, false);
            this._lastPasteOffset.add(this.pasteOffset);
            return coll;
        };
        ;
        Object.defineProperty(DrawCommandHandler.prototype, "arrowKeyBehavior", {
            /**
            * Gets or sets the arrow key behavior. Possible values are "move", "select", and "scroll".
            * The default value is "move".
            * @name DrawCommandHandler#arrowKeyBehavior
            * @function.
            * @return {string}
            */
            get: function () { return this._arrowKeyBehavior; },
            set: function (val) {
                if (val !== "move" && val !== "select" && val !== "scroll" && val !== "none") {
                    throw new Error("DrawCommandHandler.arrowKeyBehavior must be either \"move\", \"select\", \"scroll\", or \"none\", not: " + val);
                }
                this._arrowKeyBehavior = val;
            },
            enumerable: true,
            configurable: true
        });
        Object.defineProperty(DrawCommandHandler.prototype, "pasteOffset", {
            /**
            * Gets or sets the offset at which each repeated pasteSelection() puts the new copied parts from the clipboard.
            * @name DrawCommandHandler#pasteOffset
            * @function.
            * @return {Point}
            */
            get: function () { return this._pasteOffset; },
            set: function (val) {
                if (!(val instanceof go.Point))
                    throw new Error("DrawCommandHandler.pasteOffset must be a Point, not: " + val);
                this._pasteOffset.set(val);
            },
            enumerable: true,
            configurable: true
        });
        return DrawCommandHandler;
    }(go.CommandHandler));
    exports.DrawCommandHandler = DrawCommandHandler;
});
